DC-SQUID ELECTRONICS BASED ON THE NOISE CANCELLATION SCHEME

被引：33

作者：

KIVIRANTA, M

SEPPA, H

机构：

[1] VTT Automation, Measurement Technology, FIN-02150, Espoo

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1995年 / 5卷 / 02期

关键词：

D O I：

10.1109/77.403007

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We have constructed a compact de SQUID electronics unit, in which the noise of the room-temperature amplifier is measured by the SQUID and cancelled out. This makes it unnecessary to use a transformer and a modulation scheme to achieve noise matching between the SQUID and the amplifier. The electronics unit contains a PI3/2-controller and it has demonstrated a bandwidth of 100 kHz, a 1.2 mu Phi(0)/Hz white noise level and a 1/f noise corner of 0.3 HE in a flux-locked loop mode. The design criteria for the noise-cancelled electronics are discussed, including the problem of exess noise.

引用

页码：2146 / 2148

页数：3

共 5 条

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[2]

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[4] A Coupled DC SQUID with Low 1/f Noise [J].

Seppa, H. ;

Kiviranta, M. ;

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IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 1993, 3 (01) :1816-1819

[5]

SEPPA H, IEEE T MAGN, V27, P2488

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